Not really. I am getting ok time on the thing when I am at home or when I am off work. At work though my battery life is bad, not sure if it is an app, my signal(big part), or general OS deficiencies.

I would look at apps that you have installed and install a battery app so you can track your usage. Maybe spot trends, or trouble areas where you can improve battery life. I save a few percentages by installing 'WiFi or Network' (Available on App World, there are also other paid ones but I haven't tried them. The free app works fine), kills the radio when you are connected to a WiFi signal.

I'll know more in a few days, give it the week-end before I make a decision.

I've noticed with this OS if I'm listening to music and make a call and hang up the music will be mute and I have to press stop and play again to hear it. Battery life was horrible for the first day by the time I got home from work I had maybe 20% left from a full charge. I'll wait a few days and hopefully the OS will settle. Outside of that everything seems pretty solid.Posted via BlackBerryForums.com Mobile

Not really. I am getting ok time on the thing when I am at home or when I am off work. At work though my battery life is bad, not sure if it is an app, my signal(big part), or general OS deficiencies.

I would look at apps that you have installed and install a battery app so you can track your usage. Maybe spot trends, or trouble areas where you can improve battery life. I save a few percentages by installing 'WiFi or Network' (Available on App World, there are also other paid ones but I haven't tried them. The free app works fine), kills the radio when you are connected to a WiFi signal.

I'll know more in a few days, give it the week-end before I make a decision.

Appreciate the feedback. Aside from Twitter/Whatsapp, I dont have anything else installed so hopefully the battery life should at least be on par with what I have now.

I'll probably hang-fire until you report back on your findings before installing. As you say, there may well be OS deficiencies that have yet to be ironed out.

I haven't heard of a 3G bug in my dealings with 7.1, but there are various bugs and issues that crop up from time to time.

You do know that by installing the leak chances are being taken. I expect an official 7.1 for the 9900 sooner rather than later. You survived without any type of UMA support in the past. As you say though, you can\t live without it. My carrier doesn't support it, so I don't know what I am missing...LoL

Using the diagnostic tool to track battery performance (we'll see how that goes ) Options>Device>Advanced System Settings>BlackBerry Device Analyzer (if anyone is interested), after that it gives you a few options like Mail Issues, Device Responsiveness, Cellular Connections, and Hardware. I started tracking from 00:00 Monday, I'll let it run for a week or so.

- Strange install - kept my Apps and some settings, even though I chose to do no backup. In the past the OS install procedure did a "fresh install" with no apps and settings retained from the previous install. I installed using latest DM 6.1.0.36 Bundle 38, and upgraded from firmware 7.1.0.74 (and have done many successful other on 7.0.0.xxx)

- OS installs and runs OK, but with a few problems:

- GPS did not work initially. All GPS apps Google Maps, built-in BB Maps, and the Device>Location Settings>Refresh showed incorrect GPS location. Always showed location 0.0.0 and "waiting for GPS." Reboots, battery pull did not fix. Only thing that resolved the issue: run Device Analyzer>Hardware>GPS. Now works OK. Had not seen this issue on any other install.

- UMA/WiFi calling is spotty. When it works it's solid. There are several issues with WiFi calling on my BB9900. I am able to associate fine with T-Mo UMA (evidence WiFi diagnostics panel). BUT...

1) WiFi reception range is very limited (short distance) before BB9900 and UMA/WiFi calling says that the access point is too far away. Maybe 25 feet from the AP (and through only one wood/drywall wall), the BB WiFi reception strength meter is on one dot, or zero (around -80dBM according to BB9900 WiFi diagnostics). However in the same location, iPADs and notebook computers have full bars for WiFi reception strength...so BB9900 seems to have poor WiFi reception sensitivity.

2) This sensitivity causes a limited range for using WiFi calling. The phone signals "too far away" and phone wants to switch back to 2G/3G. In my location 2G/3G reception is poor, so the phone constantly hunts back and forth between 2G and WiFi calling even though when I'm only 25 ft from WiFi access point. I have the phone network set to "WiFi preferred" and the hunting problem occurs when BB9900 WiFi diagnostics claim WiFi signal strength is down around -80dBM.

3) Phone mostly seems to handle the cell/WiFi switching OK, but takes a long time (20-60?) seconds to switch onto the new transmission carrier. Sometimes though it tries to hang on too long onto the WiFi/UMA carrier even when it claims it is in low range, and therefore seems to not let incoming calls through. Result: causing me to miss calls.

4) The WiFi calling gets confused at times...sometimes incoming callers never get through, they hear the phone rings 15+ times before switches to my voice mail. Also outgoing dialed calls seem to connect, but no sound is heard on my end.

Hope someone from Blackberry gets to read this, I like my BB9900 in general and hope WiFi calling gets debugged. UMA used to work fine on my previous BB9700.

I mean with me personally a lot of these issues I have never experienced. I'm with ATT though but have you tried battery pulls and such? The only real issue I've experienced with this release is the media player issue with the muting. I've had horrible battery life but I've deleted wikitude and my battery life has greatly improved.Posted via BlackBerryForums.com Mobile

I mean with me personally a lot of these issues I have never experienced. I'm with ATT though but have you tried battery pulls and such? The only real issue I've experienced with this release is the media player issue with the muting. I've had horrible battery life but I've deleted wikitude and my battery life has greatly improved.Posted via BlackBerryForums.com Mobile

I mean with me personally a lot of these issues I have never experienced. I'm with ATT though but have you tried battery pulls and such? The only real issue I've experienced with this release is the media player issue with the muting. I've had horrible battery life but I've deleted wikitude and my battery life has greatly improved.Posted via BlackBerryForums.com Mobile

My wireless operator is T-Mobile, which enables WiFi/UMA calling. Apparently AT&T does not support this service.

The main reason *for me personally* to switch from 7.0.0.540 to 7.1.0.190 is for WiFi calling only, since the previous leak worked OK for my use, with the exception of missing WiFi/UMA and Hotspot (which I don't use).

My new usage of WiFi/UMA calling points out an apparent weakness in the BB9900 that I hadn't noticed before...its WiFi reception sensitivity is poor compared to iPAD/iPOD/notebooks. According to diagnostics, it is about -20dBM signal strength lower than iPAD/iPOD/notebooks I've tested.

That lower sensitivity makes the UMA/WiFi want to "release" sooner than it ought to...because it "thinks" I'm out of WiFi range.

There is a another symptom with WiFi...the BB9900 has a hard time "letting go" of one access point to switch to another stronger signal access point. I see this when roaming my house which has 2 associated access points at opposite ends of the house. BB9900 normally grabs onto one AP which has strongest reception, but when I move far enough away it should "let go" when its signal reception is low and switch to the stronger AP. Yes, my AP frequencies and transmit strengths have been adjusted, and yes I've done a WiFi signal sweep to adjust optimal location and transmission strengths throughout the house.

It seems these issues interact with UMA calling at what I would think is only moderate distance from the AP (20-25 ft). WiFi wants to hang on to the AP but UMA wants to let go, and vice-versa. I suspect there is some tuning/adjustment needed in the hysteresis software loop used to hold onto and let go of WiFi and UMA. It might cause the problems I observe of missed calls.

When I'm right next to the AP (5-10 feet) then WiFi/UMA calling is rock solid.
I'll check a second BB9900 (my wife's) for similar WiFi/UMA performance in case it's a hardware/WiFi antenna issue, but I doubt it.